Browse Prior Art Database

Inserting Pins Into Ceramic Substrates

IP.com Disclosure Number: IPCOM000073692D
Original Publication Date: 1971-Jan-01
Included in the Prior Art Database: 2005-Feb-22
Document File: 2 page(s) / 27K

Publishing Venue

IBM

Related People

Gery, JC: AUTHOR [+2]

Abstract

Pin insertion problems encountered with present pinning concepts are mainly due to substrate hole misalignment. To eliminate this factor, the pin insertion is effected for small quantities at a time, for example four-by-four, in holes which have the smallest misalignment relative to the insertion tool. These holes are located in a quarter of the substrate S inside locators L, and chosen parallel to one edge of the substrate. The insertion is made from the top of the substrate.

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Inserting Pins Into Ceramic Substrates

Pin insertion problems encountered with present pinning concepts are mainly due to substrate hole misalignment. To eliminate this factor, the pin insertion is effected for small quantities at a time, for example four-by-four, in holes which have the smallest misalignment relative to the insertion tool. These holes are located in a quarter of the substrate S inside locators L, and chosen parallel to one edge of the substrate. The insertion is made from the top of the substrate.

In reference to Figures A, B and C, insertion is made in quarters 2 and 4 when the substrate is located as in Fig. B and, insertion is made in quarters 1 and 3 when the substrate is located as in Fig. C.

Since, from a machine point of view the reference axis is the locator axis which is very close to the substrate diagonal, perpendicular misalignment of a corner hole is much smaller when in position A than in position B (Fig. A). This fact has been confirmed by measurements on curves relating to hole misalignment and statistics on punch breakage.

To cover the whole substrate a multihead machine is advantageously used.

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